API Exam API-571 Topic 1 Question 109 Discussion

Actual exam question for API's API-571 exam

Question #: 109
Topic #: 1

[All API-571 Questions]

The presence of _________ can destabilize the scale and turn it into a nonprotective scale.

AHS

DHO

Show Suggested Answer

Suggested Answer: D

by Kenny at Apr 03, 2025, 10:43 PM

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3 days ago

Hmm, I'm gonna go with B. O. Oxygen is known to cause issues with protective scales, right?

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6 days ago

C. H seems like the right choice here. Hydrogen can definitely destabilize the scale.

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6 days ago

I disagree, I believe it's O that can turn the scale into a nonprotective one.

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8 days ago

I think the presence of HS can destabilize the scale.

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14 days ago

I think the answer is D. HO. It makes the most sense to me.

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